nfc: st21nfca: remove unnecessary skb check before kfree_skb()

The skb will be checked in kfree_skb(), so remove the outside check.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20220318072728.2659578-1-yangyingliang@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/nfc/st21nfca/i2c.c

@@ -570,8 +570,7 @@ static int st21nfca_hci_i2c_remove(struct i2c_client *client)
 
 	if (phy->powered)
 		st21nfca_hci_i2c_disable(phy);
-	if (phy->pending_skb)
-		kfree_skb(phy->pending_skb);
+	kfree_skb(phy->pending_skb);
 
 	return 0;
 }